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/* $Id: allocex.cpp $ */
/** @file
* IPRT - Memory Allocation, Extended Alloc and Free Functions for Ring-3, posix.
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define RTMEM_NO_WRAP_TO_EF_APIS
#include <iprt/mem.h>
#include "internal/iprt.h"
#include <iprt/assert.h>
#include <iprt/err.h>
#include <iprt/string.h>
#include "internal/magics.h"
#include "allocex.h"
RTDECL(int) RTMemAllocExTag(size_t cb, size_t cbAlignment, uint32_t fFlags, const char *pszTag, void **ppv) RT_NO_THROW_DEF
{
RT_NOREF_PV(pszTag);
/*
* Validate and adjust input.
*/
AssertMsgReturn(!(fFlags & ~RTMEMALLOCEX_FLAGS_VALID_MASK), ("%#x\n", fFlags), VERR_INVALID_PARAMETER);
AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
AssertReturn(RT_IS_POWER_OF_TWO(cbAlignment), VERR_INVALID_PARAMETER);
AssertMsgReturn(cbAlignment <= sizeof(void *), ("%zu (%#x)\n", cbAlignment, cbAlignment), VERR_UNSUPPORTED_ALIGNMENT);
if (fFlags & RTMEMALLOCEX_FLAGS_ANY_CTX)
return VERR_NOT_SUPPORTED;
/*
* Align the request.
*/
size_t cbAligned = cb;
if (cbAlignment)
cbAligned = RT_ALIGN_Z(cb, cbAlignment);
else
cbAligned = RT_ALIGN_Z(cb, sizeof(uint64_t));
AssertMsgReturn(cbAligned >= cb && cbAligned <= ~(size_t)0, ("cbAligned=%#zx cb=%#zx", cbAligned, cb),
VERR_INVALID_PARAMETER);
/*
* Allocate the requested memory.
*/
void *pv;
if (fFlags & (RTMEMALLOCEX_FLAGS_16BIT_REACH | RTMEMALLOCEX_FLAGS_32BIT_REACH))
{
int rc;
if (fFlags & RTMEMALLOCEX_FLAGS_16BIT_REACH)
rc = rtMemAllocEx16BitReach(cbAligned + sizeof(RTMEMHDRR3), fFlags, &pv);
else
rc = rtMemAllocEx32BitReach(cbAligned + sizeof(RTMEMHDRR3), fFlags, &pv);
if (RT_FAILURE(rc))
return rc;
}
else if (fFlags & RTMEMALLOCEX_FLAGS_EXEC)
{
pv = RTMemPageAlloc(cbAligned + sizeof(RTMEMHDRR3));
if (pv)
{
if (fFlags & RTMEMALLOCEX_FLAGS_ZEROED)
RT_BZERO(pv, cbAligned + sizeof(RTMEMHDRR3));
int rc = RTMemProtect(pv, cbAligned + sizeof(RTMEMHDRR3), RTMEM_PROT_EXEC | RTMEM_PROT_READ | RTMEM_PROT_WRITE);
if (RT_FAILURE(rc))
{
RTMemPageFree(pv, cbAligned + sizeof(RTMEMHDRR3));
return rc;
}
}
}
else if (fFlags & RTMEMALLOCEX_FLAGS_ZEROED)
pv = RTMemAllocZ(cbAligned + sizeof(RTMEMHDRR3));
else
pv = RTMemAlloc(cbAligned + sizeof(RTMEMHDRR3));
if (!pv)
return VERR_NO_MEMORY;
/*
* Fill in the header and return.
*/
PRTMEMHDRR3 pHdr = (PRTMEMHDRR3)pv;
pHdr->u32Magic = RTMEMHDR_MAGIC;
pHdr->fFlags = fFlags;
pHdr->cb = (uint32_t)cbAligned;
pHdr->cbReq = (uint32_t)cb;
*ppv = pHdr + 1;
return VINF_SUCCESS;
}
RT_EXPORT_SYMBOL(RTMemAllocExTag);
RTDECL(void) RTMemFreeEx(void *pv, size_t cb) RT_NO_THROW_DEF
{
if (!pv)
return;
AssertPtr(pv);
PRTMEMHDRR3 pHdr = (PRTMEMHDRR3)pv - 1;
AssertMsg(pHdr->u32Magic == RTMEMHDR_MAGIC, ("pHdr->u32Magic=%RX32 pv=%p cb=%#x\n", pHdr->u32Magic, pv, cb));
pHdr->u32Magic = RTMEMHDR_MAGIC_DEAD;
Assert(pHdr->cbReq == cb); RT_NOREF_PV(cb);
if (pHdr->fFlags & (RTMEMALLOCEX_FLAGS_16BIT_REACH | RTMEMALLOCEX_FLAGS_32BIT_REACH))
rtMemFreeExYyBitReach(pHdr, pHdr->cb + sizeof(*pHdr), pHdr->fFlags);
else if (pHdr->fFlags & RTMEMALLOCEX_FLAGS_EXEC)
{
RTMemProtect(pHdr, pHdr->cb + sizeof(*pHdr), RTMEM_PROT_READ | RTMEM_PROT_WRITE);
RTMemPageFree(pHdr, pHdr->cb + sizeof(*pHdr));
}
else
RTMemFree(pHdr);
}
RT_EXPORT_SYMBOL(RTMemFreeEx);
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